1 files changed, 68 insertions, 0 deletions
diff --git a/main.ino b/main.ino
index a4c64bc..d8f50b1 100644
--- a/main.ino
+++ b/main.ino
@@ -16,6 +16,8 @@ const int longpress_duration = 2000; // time in milliseconds
 // dirty hack: assume that any ESP32 board is a Lilygo T5 V2.2
 #define LILYGO_T5_V22
 #include "boards.h" // source: https://github.com/lewisxhe/GxEPD/blob/master/src/boards.h
+#define HAS_DISPLAY
+
 const byte BUTTON_PIN_MOVE = BUTTON_1;
 const byte BUTTON_PIN_SELECT = BUTTON_2;
 BlinkControl led(LED_PIN);
@@ -31,6 +33,42 @@ BlinkControl led(LED_BUILTIN); // pin 13 is built-in LED on many Arduino boards
 EasyButton button_move(BUTTON_PIN_MOVE);
 EasyButton button_select(BUTTON_PIN_SELECT);
 
+#if defined(HAS_DISPLAY)
+#define ENABLE_GxEPD2_GFX 1
+
+#include <GxEPD2_BW.h>
+#include <Fonts/FreeMonoBold9pt7b.h>
+#include <U8g2_for_Adafruit_GFX.h>
+
+// source: https://github.com/ZinggJM/GxEPD2/blob/master/examples/GxEPD2_Example/GxEPD2_display_selection.h#L192
+GxEPD2_BW<GxEPD2_290, GxEPD2_290::HEIGHT> displayEPaper(GxEPD2_290(EPD_CS, EPD_DC, EPD_RSET, EPD_BUSY));
+
+U8G2_FOR_ADAFRUIT_GFX u8g2Fonts;
+
+#include <GEM_u8g2.h>
+
+// Create variables that will be editable through the menu and assign them initial values
+int number = -512;
+boolean enablePrint = false;
+
+// Create two menu item objects of class GEMItem, linked to number and enablePrint variables 
+GEMItem menuItemInt("Number:", number);
+GEMItem menuItemBool("Enable print:", enablePrint);
+
+// Create menu button that will trigger printData() function. It will print value of our number variable
+// to Serial monitor if enablePrint is true. We will write (define) this function later. However, we should
+// forward-declare it in order to pass to GEMItem constructor
+void printData(); // Forward declaration
+GEMItem menuItemButton("Print", printData);
+
+// Create menu page object of class GEMPage. Menu page holds menu items (GEMItem) and represents menu level.
+// Menu can have multiple menu pages (linked to each other) with multiple menu items each
+GEMPage menuPageMain("Main Menu");
+
+// Create menu object of class GEM_u8g2. Supply its constructor with reference to u8g2 object we created earlier
+GEM_u8g2 menu(u8g2);
+#endif
+
 void setup() {
   Serial.begin(BAUDRATE);
   while (!Serial) {
@@ -46,6 +84,13 @@ void setup() {
 
   led.begin();
   led.breathe(2000);
+
+  displayEPaper.init(115200, true, 2, false);
+  u8g2Fonts.begin(display);
+
+  menu.init();
+  setupMenu();
+  menu.drawMenu();
 }
 
 void loop() {
@@ -77,3 +122,26 @@ void onButtonSelectPressed() {
     Serial.println("button SELECT clicked");
     led.on();
 }
+
+void setupMenu() {
+  // Add menu items to menu page
+  menuPageMain.addMenuItem(menuItemInt);
+  menuPageMain.addMenuItem(menuItemBool);
+  menuPageMain.addMenuItem(menuItemButton);
+
+  // Add menu page to menu and set it as current
+  menu.setMenuPageCurrent(menuPageMain);
+}
+
+void printData() {
+  // If enablePrint flag is set to true (checkbox on screen is checked)...
+  if (enablePrint) {
+    // ...print the number to Serial
+    // Note, there might be some problems w/ displaying Cyrillic characters in Serial monitor,
+    // in which case adjusting baud rate may help
+    Serial.print("Число: ");
+    Serial.println(number);
+  } else {
+    Serial.println("Печать не разрешена:(");
+  }
+}